Distributor head for evaporators



h 2, 1940- w. R. RAMSAUR 1 3,

DISTRIBUTOR HEAD FOR EVAPORA'I'ORS Filed Aug. 23, 1937 INVEN 7m? Mute A.human Patented Mar. 12, 1940 DISTRIBUTOR HEAD FOR EVAPORATOBS Walter B.Ramsaur, Racine, Wis., assignor to Young Radiator Company, Racine, Wis.

Application August 23, 1937, Serial No. 160,404

3 Claims.

Modern evaporators may be made in from two to eight or more separatesections. It is desirable to distribute the refrigerant equally intoeach section. This is difflcult to accomplish because of v the nature ofrefrigerants. They are not always in a complete liquid state when theyreach the v distributor head, the pressure varies considerably and isfrequently controlled by valves operating on the on-and-off principleand when otherwise controlled the pressure and supply is erratic anduncertain.

The principal object of the present invention is to provide a head whichwill distribute the refrigerant and the gases equally to the individualevaporator sections.

Another object of the present invention is to provide a simple and lightdistributor head which may be manufactured at low cost.

To these and other useful ends my invention consists of parts,combinations of parts or their equivalents, and mode of operation ashereinafter described and claimed and shown in the accompanying drawingin which:

Fig. 1 is a top view of my distributor head having the cap of thechamber removed thus to disclose the interior.

Fig. 2 is a vertical transverse section of my invention taken on line2-2 of Figure 1.

Fig. 3 is a view similar to Figure 1 showing the head only and havingeight outlets instead of four.

Fig. 4 illustrates a modification showing a fraction of an outlet tubeand chamber.

As: thus illustrated a fraction of an evaporator core is shown. Numerall0 designates the inlet end of one of the evaporator sections having onheader plates l3 preferably as illustrated. I

, provide a sleeve M with which to make the tube connections from thedistributor head. The inlet end of each individual section of anevaporator is provided with a connection of this kind.

My distributor head comprises a chamber having a bottom head i 5 intothe center-of which the inlet tube It is secured as illustrated. InFigures 1 and 2 I illustrate a distributor head equipped for a foursection evaporator. The head illustrated in Figures 1 and 2 is thereforeprovided with four outlet tubes numbered 20, 2|, 22 and 23, each beingsecured to the bottom head l5,

their upper ends protruding through this memher as illustrated in Figure2. Tube 20 is preferably secured to the top section of the evaporator asillustrated, each of the other tubes forming a connection to itsindividual evaporator sec- 5 tion as fractionally illustrated. v

The protruding end of each outlet tube is-provided with preferably a Vshaped cut-away portion 24. These portions are preferably positioned vonthe side of the tube facing the center of the 10 header. I provide ahousing member 26 having a cap 21, thus forming an inclosurefor theprotruding tube ends, the tubes being preferably spaced around the inlettube as illustrated in Fi 15 distribute the refrigerant to the variouscoils; 29

thus the cut-away portions being similar in shape and position, therefrigerant will be caused to flow into the outlet tubes in equal volumeregardless of its height in the chamber; and since there is always moreor less gas present in the refrigerant, 25

the height of the refrigerant will depend upon the volume entering thechamber, which will be controlled by gravity, the surplus gas escapingwith the liquid refrigerant.

Opening 24 in the side of the tube will prefer- 30 ably have an areaequal to the area of the tube and will therefore deliver the maximumamount of refrigerant to its respective tube before the level in thechamber reaches the top of the tube.

Thus it will be seen that I have provided a dis- 35 tributing head whichwill operate successfully on various quantities of refrigerant andaccompanying gas, delivering to each evaporator coil an equal quantity.Clearly my distributor head'may be adapted to accommodate any number ofoutlet 40 the tube will gradually increase as in the design 50illustrated in Figure 2.

A distinct advantage of the present invention is that valves may beplaced in the outlets, whereby one or more of the evaporator sectionsmay be cutout and the remaining sections will each 55 continue toreceive equal quantities of refrigerant.

Obviously various changes in details may be made without departing fromthe spirit and scope of the invention as recited in the appended claims.

Having thus shown and described my invention, I claim:

1. A distributor head for evaporators comprising a chamber having ahorizontally positioned bottom head, a refrigerant inlet in said head,outlet tubes in said head being positioned adjacent said inlet, saidoutlet tubes extending a distance into said chamber and having thereinvertically positioned cut-away portions 'extending from adjacent saidhead to the top of the tubes, whereby the entering refrigerant may flowequally into said openings in quantities measured by the height of therefrigerant in said chamber.

2. A distributor head for evaporators comprising a chamber having ahorizontally positioned bottom head, a refrigerant inlet in said head,re-

frigerant outlet tubes in said head, said outlet tubes extending adistance into said chamber, the extended end of eachtube having a Vshaped slit in its side and parallel to the tube, the bottoms of theslits being adjacent said head and on the same horizontal plane wherebythe entering refrigerant may flow equally into said outlets, the volumethus flowing depending upon the height of the refrigerant in saidchamber.

3. A distributor head for evaporators, comprising a chamber having acentrally positioned inlet in its bottom, outlet tubes in the bottom ofsaid chamber and extending a distance into said chamber and beingpositioned in spaced relation around said inlet and the same distancetherefrom, vertically positioned openings in said extended ends andextending from adjacent said bottom to adjacent the top, whereby therefrigerant may accumulate in said chamber and flow equally into eachsaid outlets.

WALTER R. RAMSAUR.

